Premium
Anaesthetic induction time for tracheal intubation using sevoflurane or halothane in children
Author(s) -
Inomata S.,
Yamashita S.,
Toyooka H.,
Yaguchi Y.,
Taguchi M.,
Sato S.
Publication year - 1998
Publication title -
anaesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.839
H-Index - 117
eISSN - 1365-2044
pISSN - 0003-2409
DOI - 10.1046/j.1365-2044.1998.00338.x
Subject(s) - sevoflurane , medicine , halothane , intubation , anesthesia , tracheal intubation , tracheal tube , general anaesthesia , surgery
The current study was designed to determine the anaesthetic induction time required for tracheal intubation (Time EI ) with equipotent inspired concentrations of 5% sevoflurane and 2.5% halothane in oxygen. Time EI that prevents 50% and 95% of patients from coughing and gross purposeful muscular movements after intubation was defined as Time EI 50 and Time EI 95, respectively. Thirty‐six patients aged 1–7 years were enrolled in the study. Anaesthesia was induced via mask and when Time EI attained a predetermined value, intubation was performed using an uncuffed tube. Each Time EI at which tracheal intubation was attempted was predetermined according to the up‐and‐down method. When intubation was accomplished without gross purposeful muscular movements, it was considered a smooth intubation. Determination with this method revealed that Time EI 50 and Time EI 95 for the sevoflurane/halothane groups were 147/214 s and 194/255 s, respectively. In conclusion, it is possible to determine Time EI using an inspired sevoflurane concentration of 5% and halothane 2.5% in oxygen. The technique with 5% sevoflurane seems more practical for paediatric anaesthesia induction in busy clinical situations.